一种基于语义引导和对比学习的战场图像去烟算法

烟雾作为现代战争中最常见的作战产物,不可避免地会降低作战场景的可视性,进而影响下游军事智能系统的性能,因此对含烟图像进行复原处理非常重要,现有算法通常忽略图像中高阶的语义信息和降质图像本身都可以为提高网络去烟能力提供有价值的监督信息。为此,提出一种基于语义引导和对比学习的生成对抗网络来去除战场图像中的烟雾。通过在低阶视觉任务中融入高阶语义特征,将语义信息作为引导帮助网络更好地恢复图像的结构和色彩信息;利用对比学习范式将清晰和含烟图像构建为正、负样本,并采用对比约束使去烟后的图像与清晰图像接近,并远离含烟图像。此外,为模拟真实的战场含烟场景,首次构建一套含烟战场数据集,推进了相关研究的发展。实验结果表明,与现有图像去烟算法相比,所提方法在定量和定性指标上均达到了先进水平。

基于深度学习的火场灰度图像去烟算法

火场环境中由于大量烟雾的存在导致视频监控系统画面变得模糊不清,图像对比度和清晰度下降,无法为人员疏散和消防搜救提供有效的视觉支持。针对这一情况,本文提出一种基于深度学习的灰度图像去烟算法。本文中的网络主要由检测子网络与去除子网络2个部分串联组成,前者通过残差学习网络来确定烟雾所在的具体位置,后者通过密集连接的U型网络在保留原先背景的情况下去除烟雾,其中利用Dense Block将低层特征复用到高层从而进一步提高去烟的准确性。大量的实验结果显示,采用该网络表现出更好的去除清晰效果和实时性,主观评价和客观评价上均优于其他对比算法。

基于条件生成对抗网络的医学手术图像去烟算法

医学手术中图像去烟算法可以提高术中成像质量,减少图像引导手术的危害,这是许多临床应用中非常理想的预处理方法。针对这一问题,本文提出一种基于条件生成对抗模型的图像去烟网络,该网络由生成器子网络和鉴别器子网络构成。其中,用Tiramisu模型代替传统的U-Net,从而得到更高的参数效率和性能。此外,通过利用计算机图形渲染引擎的方式为此类问题生成大量训练数据集提供一个新思路。实验结果表明,本文方法在保留图像重要感知信息的同时,有效地减少了烟,在定性和定量分析上均优于现有图像去烟算法,从而为外科医生提供更好的手术视野可视化。

船舶舱室火灾图像实时去烟算法研究

烟雾会降低能见度,为船舶火灾消防带来极大不便。研究图像实时去烟算法,并应用到视频监控或消防设备中,为消防行动提供视觉支持,对提高行动效率具有重大意义。本文提出一种图像实时去烟算法,在分析了船舶舱室火灾图像特点的基础上,基于传统Retinex理论,引入滚动导向滤波代替高斯滤波,取消对数计算,并结合图像金字塔设计了多尺度处理,通过对比度拉伸优化视觉效果。主、客观评价的结果表明,该算法去烟效果良好,优于直方图均衡化、多尺度Retinex、暗通道先验3种经典图像清晰化算法,且对640×480×3像素RGB图像的处理时间仅为95 ms。

“智叻”去烟渍特效牙膏研究报告

“智叻”去烟渍特效牙膏研究报告广东省中山市永南日用化工厂（５２８４１５）关存钢雷锡全关玉宇广东省广宁县美洁日用品有限公司梁肇谊在吸烟者的牙齿表面往往牢固地吸附着一层黑褐色的污垢，这主要是由烟碱的作用而产生的。烟碱又称吡啶氢化吡咯，其分子内含有吡啶和吡...

基于同态滤波的灰度图像去烟处理方法

传统方法的去烟处理效果不够明显,处理后灰度图像的信息熵值比较小,为此笔者提出基于同态滤波的灰度图像去烟处理方法。该方法采用补偿函数对灰度图像进行光照补偿,然后通过对灰度图像进行比例线性调整和变换,按照设定的比例对灰度图像的灰度分类进行扩展,最后利用同态滤波函数改变灰度图像的光照分量和反射分量,从而达到去烟的目的,以此完成基于同态滤波的灰度图像去烟处理。实验结果表明,该方法优于传统方法。

Catalytic performance of Ag/Co-Ce composite oxides during soot combustion in O_2 and NO_x:Insights into the effects of silver

The composite oxides xAg/Co_（0.93）Ce_（0.07）（x=Ag/（Co＋Ce） molar ratio）,intended for use as high performance catalytic materials,were successfully prepared via citric acid complexation.The effects of silver on the performance of these substances during soot combustion were subsequently investigated.Under O_2,the 0.3Ag/Co_（0.93）Ce_（0.07） catalyst resulted in the lowest ignition temperature,T_（10）,of197 ℃,while the minimum light-off temperature was obtained from both 0.2Ag/Co_（0.93）Ce_（0.07） and0.3Ag/Co_（0.93）Ce_（0.07） in the NO_x atmosphere.These materials were also characterized by various techniques,including H_2,soot and NO_x temperature programmed reduction,X-ray diffraction,and electron paramagnetic resonance,Raman,X-ray photoelectron,and Fourier transform infrared spectroscopic analyses.The results demonstrated that silver significantly alters the catalytic behavior under both O_2 and NO_x,even though the lattice structure of the mixed oxide is not affected.Surface silver oxides generated under the O_2 atmosphere favor soot combustion by participating in the redox cycles between soot and the silver oxide,whereas the AgNO_3 that forms in a NO_x-rich atmosphere facilitates soot abatement at a lower temperature.The inferior activity of AgNO_3 relative to that of Ag_2O results in the different catalytic performance in the presence of NO_x or O_2.

Multi-pollutants simultaneous removal from flue gas

The multi-stages humidifier semi-dry flue gas cleaning technology, the CRS plasma flue gas cleaning technology and oxidative additive flue gas cleaning technology were investigated for multi-pollutants removal. The semi-dry flue gas cleaning technology using multi-stages humidifier and additive can improve oxidation and absorption, and it can achieve high multi-pollutants removal efficiency. The CRS discharge can produce many OH radicals that promote NO oxidation. Combining NaOH absorption can achieve high deSO2 and deNO, efficiencies. It is fit for the reconstruction of primary wet flue gas desulfurization （WFGD）. In addition, using NaClO2 as additive in the absorbent of WFGD can obtain very high removal efficiency of SO2 and NOx.

Control Effect of 80% Nicosulfuron·Atrazine Water-dispersible Granules on Weeds in Spring Maize Field

[Objective] This study aimed to investigate the control effect of different concentrations of 80% nicosulfuron·atrazine water-dispersible granules on weeds in spring maize field. [Method] Maize field was sprayed with 300, 375, 450, 750 g/hm280% nicosulfuron·atrazine water-dispersible granules respectively, with 40 g/L nicosulfuron suspending concentrate and 38% atrazine suspending concentrate as control agents. Artificial weeding and control(CK) plots were set. [Result] Fresh weight control efficiency of 375-750 g/hm280% nicosulfuron·atrazine water-dispersible granules was significantly higher than that of 40 g/L nicosulfuron suspending concentrate and 38% atrazine suspending concentrate; no obvious phytotoxicity symptoms were observed after application of 300-450 g/hm280% nicosulfuron·atrazine waterdispersible granules; 750 g/hm280% nicosulfuron·atrazine water-dispersible granules posed certain impact on the growth of maize seedlings. Compared with control plots, various doses of 80% nicosulfuron·atrazine water-dispersible granules significantly improved the yield of maize. [Conclusion] In the present study, 375-450 g/hm280% nicosulfuron·atrazine water-dispersible granules exhibited high control effect on weeds in maize field and were safe for the growth of maize seedlings.

卖花姑娘

那是九六年的一个春天,我去烟台开会,列车行驶在苍茫的齐鲁大地上,人的心胸也变得空旷起来。大约是午后时分,列车缓缓停在了一座小站边。隔车窗望去。